Kids triathlons in UK
Find kids triathlons near me in UK for 2025/2026 - search by date or place, display on a map or use the advanced search to find your perfect race.
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Click an event for full event details, location, route, sustainability, what's included and how to enter.

- Sat 28 Jun
- £20
- Sat 28 Jun
- £20
ATW Childrens Triathlon Mallory Park | Tristart
Mallory Park Junior Triathlon: Where Dreams Take Flight! Nurturing the next generation of triathletes, providing a safe and exhilarating environment for children to discover the thrill of multisports.
- Enter online
- Traffic free
- Age 8-8
- 100 m lake swimming
- 1.5 km road cycling + 16 ft ascent
- 600 m road running + 20 ft ascent

- Sat 28 Jun
- £31
- Sat 28 Jun
- £31
ATW Childrens Triathlon Mallory Park | Tristar 1
Mallory Park Junior Triathlon: Where Dreams Take Flight! Nurturing the next generation of triathletes, providing a safe and exhilarating environment for children to discover the thrill of multisports.
- Enter online
- Traffic free
- Age 9-10
- 200 m lake swimming
- 4 km road cycling + 98 ft ascent
- 1.2 km road running

- Sat 28 Jun
- £31
- Sat 28 Jun
- £31
ATW Childrens Triathlon Mallory Park | Tristar 2
Mallory Park Junior Triathlon: Where Dreams Take Flight! Nurturing the next generation of triathletes, providing a safe and exhilarating environment for children to discover the thrill of multisports.
- Enter online
- Traffic free
- Age 11-12
- 300 m lake swimming
- 6 km road cycling + 79 ft ascent
- 1.8 km road running

- Sat 28 Jun
- £31
- Sat 28 Jun
- £31
ATW Childrens Triathlon Mallory Park | Tristar 3
Mallory Park Junior Triathlon: Where Dreams Take Flight! Nurturing the next generation of triathletes, providing a safe and exhilarating environment for children to discover the thrill of multisports.
- Enter online
- Traffic free
- Age 13-14
- 500 m lake swimming
- 8 km road cycling + 49 ft ascent
- 2.4 km road running

- Sat 28 Jun
- £31
- Sat 28 Jun
- £31
ATW Childrens Triathlon Mallory Park | Youth
Mallory Park Junior Triathlon: Where Dreams Take Flight! Nurturing the next generation of triathletes, providing a safe and exhilarating environment for children to discover the thrill of multisports.
- Enter online
- Traffic free
- Age 15-16
- 500 m lake swimming
- 8 km road cycling + 49 ft ascent
- 2.4 km road running

- Sun 29 Jun
- £30
- Sun 29 Jun
- £30
English Riviera Triathlon | TriStar 2
Start with a great sea swim in warm waters then on to the bikes for a closed road and flat bike leg. Finally there's a run with views of the sea. Torre Abbey Sands has excellent water quality.
- Chip timing
- Enter online
- Undulating
- Age 11-12
- 300 m sea swimming
- 5 km road cycling + 164 ft ascent
- 2 km road running

- Sun 29 Jun
- £33
- Sun 29 Jun
- £33
English Riviera Triathlon | TriStar 3
Start with a great sea swim in warm waters then on to the bikes for a closed road and flat bike leg. Finally there's a run with views of the sea. Torre Abbey Sands has excellent water quality.
- Chip timing
- Enter online
- Undulating
- Age 13-14
- 300 m sea swimming
- 10 km road cycling + 328 ft ascent
- 2.5 km road running + 106 ft ascent

- Sun 29 Jun
- £47
- Sun 29 Jun
- £47
English Riviera Triathlon | Super Sprint
Start with a great sea swim in warm waters then on to the bikes for a closed road and flat bike leg. Finally there's a run with views of the sea. Torre Abbey Sands has excellent water quality.
- Chip timing
- Enter online
- Undulating
- Age 15 & over
- 300 m sea swimming
- 10 km road cycling + 328 ft ascent
- 2.5 km road running + 106 ft ascent

- Sat 12 Jul
- £22.50-£25
- Entries close soon
- Sat 12 Jul
- £22.50-£25
- Entries close soon
Ripon Triathlon Festival | TriStar Start
Ripon is unique as the only open-water junior racing in the Yorkshire series! So give your juniors the most exciting triathlon experience this year. Bike and run are traffic-free on grass surface.
- Enter online
- Flat
- Traffic free
- Age 8-8
- 100 m lake swimming
- 1000 m mountain biking
- 600 m multi terrain running

- Sat 12 Jul
- £25-£27.50
- Entries close soon
- Sat 12 Jul
- £25-£27.50
- Entries close soon
Ripon Triathlon Festival | TriStar 1
Ripon is unique as the only open-water junior racing in the Yorkshire series! So give your juniors the most exciting triathlon experience this year. Bike and run are traffic-free on grass surface.
- Enter online
- Flat
- Traffic free
- Age 9-10
- 200 m lake swimming
- 2000 m mountain biking
- 1200 m xc running

- Sat 12 Jul
- £25-£27.50
- Entries close soon
- Sat 12 Jul
- £25-£27.50
- Entries close soon
Ripon Triathlon Festival | TriStar 2
Ripon is unique as the only open-water junior racing in the Yorkshire series! So give your juniors the most exciting triathlon experience this year. Bike and run are traffic-free on grass surface.
- Enter online
- Flat
- Traffic free
- Age 11-12
- 300 m lake swimming
- 4000 m mountain biking
- 1800 m xc running

- Sat 12 Jul
- £27.50-£30
- Entries close soon
- Sat 12 Jul
- £27.50-£30
- Entries close soon
Ripon Triathlon Festival | TriStar 3
Ripon is unique as the only open-water junior racing in the Yorkshire series! So give your juniors the most exciting triathlon experience this year. Bike and run are traffic-free on grass surface.
- Enter online
- Flat
- Traffic free
- Age 13-14
- 500 m lake swimming
- 6000 m mountain biking
- 2400 m xc running

- Sat 12 Jul
- £27.50-£30
- Entries close soon
- Sat 12 Jul
- £27.50-£30
- Entries close soon
Ripon Triathlon Festival | Youth
Ripon is unique as the only open-water junior racing in the Yorkshire series! So give your juniors the most exciting triathlon experience this year. Bike and run are traffic-free on grass surface.
- Enter online
- Flat
- Traffic free
- Age 15-16
- 500 m lake swimming
- 6000 m mountain biking
- 2400 m xc running

- Sat 19 Jul
- £40-£60
- Sat 19 Jul
- £40-£60
Belvoir Castle | Triathlon 11-12 years
Get the family active in the beautiful castle grounds in an event for all levels - even beginners. Bring your friends and celebrate completing your challenge in the festival village.
- Chip timing
- Enter online
- Age 11-12
- 300 m lake swimming
- 4 km road cycling
- 1.6 km road running

- Sat 19 Jul
- £35-£60
- Sat 19 Jul
- £35-£60
Belvoir Castle | Triathlon 9-10 years
Get the family active in the beautiful castle grounds in an event for all levels - even beginners. Bring your friends and celebrate completing your challenge in the festival village.
- Chip timing
- Enter online
- Age 9-10
- 200 m lake swimming
- 4.2 km road cycling
- 1.3 km road running

- Sun 20 Jul
- £50-£60
- Sun 20 Jul
- £50-£60
Belvoir Castle | Triathlon 15-16 years
Race through the beautiful castle grounds in an event for all levels - even beginners. Recruit your friends to join in too then celebrate afterwards in the festival village.
- Chip timing
- Enter online
- Age 15-16
- 500 m lake swimming
- 8 km road cycling
- 2.4 km road running

- Sun 20 Jul
- £45-£60
- Sun 20 Jul
- £45-£60
Belvoir Castle | Triathlon 13-14 years
Get the family active in the beautiful castle grounds in an event for all levels - even beginners. Bring your friends and celebrate completing your challenge in the festival village.
- Chip timing
- Enter online
- Age 13-14
- 400 m lake swimming
- 8 km road cycling
- 2.4 km road running

- Sun 17 Aug
- £21
- Sun 17 Aug
- £21
ATW Oundle Children’s Triathlon | Tristart
ATW is the largest triathlon organiser in the UK and is bringing you the Oundle Childrens Triathlon! Ideal for all levels including very first attempts at triathlon.
- Chip timing
- Enter online
- Age 8-8
- 50 m pool swimming
- 800 m mountain biking + 0 ft ascent
- 600 m trail running + 3 ft ascent

- Sun 17 Aug
- £29
- Sun 17 Aug
- £29
ATW Oundle Children’s Triathlon | Tristar 1
ATW is the largest triathlon organiser in the UK and is bringing you the Oundle Childrens Triathlon! Ideal for all levels including very first attempts at triathlon.
- Chip timing
- Enter online
- Age 9-10
- 150 m pool swimming
- 2 km mountain biking + 26 ft ascent
- 1.2 km trail running

- Sun 17 Aug
- £29
- Sun 17 Aug
- £29
ATW Oundle Children’s Triathlon | Tristar 2
ATW is the largest triathlon organiser in the UK and is bringing you the Oundle Childrens Triathlon! Ideal for all levels including very first attempts at triathlon.
- Chip timing
- Enter online
- Age 11-12
- 200 m pool swimming
- 4 km mountain biking
- 1.8 km trail running

- Sun 17 Aug
- £29
- Sun 17 Aug
- £29
ATW Oundle Children’s Triathlon | Tristar 3
ATW is the largest triathlon organiser in the UK and is bringing you the Oundle Childrens Triathlon! Ideal for all levels including very first attempts at triathlon.
- Chip timing
- Enter online
- Age 13-14
- 300 m pool swimming
- 6 km mountain biking
- 2.4 km trail running

- Sun 17 Aug
- £29
- Sun 17 Aug
- £29
ATW Oundle Children’s Triathlon | Youth
ATW is the largest triathlon organiser in the UK and is bringing you the Oundle Childrens Triathlon! Ideal for all levels including very first attempts at triathlon.
- Chip timing
- Enter online
- Age 15-16
- 400 m pool swimming
- 8 km mountain biking
- 3 km trail running

- Sat 27 Sep
- £35-£60
- Sat 27 Sep
- £35-£60
Hever Castle Triathlon and Multisport Festival | Triathlon 9-10 years
Get the family active in the award-winning castle grounds in a triathlon for all abilities - even beginners then celebrate with friends and family in the festival village.
- Chip timing
- Enter online
- Age 9-10
- 200 m lake swimming
- 4.2 km road cycling
- 1.3 km road running

- Sun 28 Sep
- £45-£60
- Sun 28 Sep
- £45-£60
Hever Castle Triathlon and Multisport Festival | Triathlon 13-14 years
Get the family active in the award-winning castle grounds in a triathlon for all abilities - even beginners then celebrate with friends and family in the festival village.
- Chip timing
- Enter online
- Age 13-14
- 400 m lake swimming
- 8.4 km road cycling
- 2.5 km road running + 69 ft ascent

- Sun 28 Sep
- £40-£60
- Sun 28 Sep
- £40-£60
Hever Castle Triathlon and Multisport Festival | Triathlon 11-12 years
Get the family active in the award-winning castle grounds in a triathlon for all abilities - even beginners then celebrate with friends and family in the festival village.
- Chip timing
- Enter online
- Age 11-12
- 300 m lake swimming
- 4.2 km road cycling
- 1.8 km road running